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WO2001055614A1 - Elastic articulation safety - Google Patents

Elastic articulation safety Download PDF

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Publication number
WO2001055614A1
WO2001055614A1 PCT/EP2001/000650 EP0100650W WO0155614A1 WO 2001055614 A1 WO2001055614 A1 WO 2001055614A1 EP 0100650 W EP0100650 W EP 0100650W WO 0155614 A1 WO0155614 A1 WO 0155614A1
Authority
WO
WIPO (PCT)
Prior art keywords
radially
diameter
rigid frame
rigid
articulation
Prior art date
Application number
PCT/EP2001/000650
Other languages
French (fr)
Inventor
Michel Gautheron
Philippe Courtois
Original Assignee
Michelin Mavs
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Michelin Mavs filed Critical Michelin Mavs
Priority to EP01909670A priority Critical patent/EP1250538B1/en
Priority to DE60109415T priority patent/DE60109415D1/en
Priority to AU2001237328A priority patent/AU2001237328A1/en
Publication of WO2001055614A1 publication Critical patent/WO2001055614A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/38—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type
    • F16F1/3807—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type characterised by adaptations for particular modes of stressing
    • F16F1/3814—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type characterised by adaptations for particular modes of stressing characterised by adaptations to counter axial forces

Definitions

  • the present invention relates to elastomeric joints used in particular on motor vehicles and the methods for obtaining these joints.
  • the role of these joints is generally twofold. On the one hand, they allow degrees of freedom to the rigid elements which they connect. On the other hand, they filter a significant part of the vibrations or shocks transmitted by the road or the vehicle engine.
  • a joint consists of rigid parts connected together by at least one flexible element. In normal operation, the relative movements of rigid parts are authorized by the elastic deformation of the flexible element or elements. In the event of rupture of the deformable element following extreme stress, a defect or normal wear of the part, it is sometimes essential, for example for reasons of passive safety, that the rigid elements are held together.
  • the rupture of this element can allow the complete separation of the rigid parts respectively linked to the reinforcements.
  • generally fixed by tight fitting in the external part and linked to the other part by a screw or a bolt passing through the internal reinforcement. If the joint is subjected to a significant force (shock for example), there is a risk that it will come out of this fitting, interrupting the connection.
  • an additional element is maintained during assembly maintained by the fixing means.
  • This element takes the form of a thick flat or profiled metal washer.
  • the size of this washer is such that in the event of the deformable element breaking, the washer prevents the separation of reinforcements.
  • a washer of sufficient size prevents complete separation of the elements. The energy dissipated during these deformations (in the event of an exceptional shock) is an important performance criterion for these links.
  • this washer Another possible function (depending on the geometry selected) of this washer is to limit the deformation of the elastomer in the event of extreme stresses in order to protect the joint.
  • the invention proposes to replace this additional element by a specific profile of the end of the interior frame which integrates the functions of the washer of the prior art while eliminating the associated manipulations.
  • the invention consists of an elastic articulation comprising a rigid radially inner reinforcement having at a first end a first maximum external diameter and a rigid radially external reinforcement having a first minimum internal diameter of an adjacent end, said rigid reinforcements substantially cylindrical and concentric being integral without sliding of an elastomeric material, said first end projecting axially from said outer frame, said first outside diameter of said rigid radially inner frame being greater than said first minimum inside diameter of said rigid radially outside frame.
  • the invention also consists in a method of securing an elastic articulation comprising a radially external rigid reinforcement and a radially internal rigid reinforcement, said reinforcements being substantially cylindrical and concentric, integral without sliding with an elastomeric element, said elastomeric element being formed by molding, an axial deformation of said elastic articulation being limited by the fact that a maximum external diameter of one end of said radially internal reinforcement is greater than a minimum internal diameter of said radially external reinforcement, said maximum external diameter being obtained, after molding of said elastomeric element, by rolling of said end of said radially inner frame.
  • a first variant of the invention proposes to combine an increase in limited diameter with a reduction in the minimum internal diameter of the external reinforcement conferred by a particular profile of the end of the external reinforcement.
  • a second variant of the invention proposes to achieve this increase in diameter after mounting the joint on one of the rigid elements which it connects.
  • a snap tending to increase the outside diameter of the internal reinforcement beyond the outside diameter of the joint (diameter of the fitting) allows the joint to be secured. It is possible to limit the bolting to obtaining an outside diameter greater than the inside diameter of the outer frame without exceeding the nominal diameter of the joint (fitting diameter). This allows mounting of the joint without any particular constraint while preventing the separation of the reinforcements in the event of the elastomeric part breaking.
  • Fig 1 securing by washer (prior art)
  • Fig 2 articulation secured by bolting
  • Fig 3 articulation secured by bolting associated with a particular profile of the external frame
  • Fig 4 articulation partially secured by bolting associated with a particular profile of the external frame
  • Fig 5 articulation doubly secured
  • Fig 6 joint undergoing the bolting process.
  • FIG. 1 there is shown an example of assembly known from the prior art.
  • Rigid elements such as the axle, the wheel carrier or the body (1) of a vehicle and an arm (2) of its suspension are articulated by means of an elastic articulation (3).
  • the outer frame (8) of the joint (3) is force fitted into the arm (2).
  • the internal frame (6) of the articulation (3) is held integral with the body (1) by a screw (4).
  • a washer (5) is interposed, the diameter is greater than that of the arm fitting.
  • the profile of this washer may vary. It is obviously possible to use a second washer placed at the other axial end of the joint if the geometry of the rigid elements is different and it is desired to avoid excessive axial deformation of the joint in both directions along its axis.
  • Figure 2 shows a joint according to the invention.
  • An annular projection (9), formed on a first end of the inner frame (6) by bolting has a maximum outside diameter greater than the minimum inside diameter of the outer frame (8) and performs the same functions as the washer (5 ) of Figure 1.
  • the fitting can be carried out by exerting the fitting pressure on the internal frame, which can simplify the necessary tools, thus lowering the cost.
  • FIG. 3 represents a second embodiment of the invention.
  • the difference compared to FIG. 2 lies in the fact that the annular projection (9) obtained by bolting is less significant and cooperates with one end (10) of the external reinforcement which has a shoulder (16) and a reduction (15 ) of its internal diameter.
  • the advantages described for the embodiment of Figure 2 are preserved and the relative size of the projection (9) is reduced.
  • the dimensions and shapes of the shoulder (16) and of the reduction (15) relative to the profile of the annular projection (9) can make it possible to modulate the amount of energy dissipated during an exceptional impact as they are simulated at l occasion of "crash tests".
  • Figure 4 relates to a third embodiment of the invention.
  • the advantage compared to the previously described modes (FIGS. 2 and 3) lies in the fact that the fitting of the articulation (3) in the arm (2) is possible in both directions because the outside diameter of the projection ( 9) is less than that of the fitting.
  • the external frame has a reduction (15) which cooperates with the annular projection (9) in order to prevent the separation of the rigid articulated elements (1,2). This function is only ensured within the limit of the holding force of the fitting.
  • FIG. 5 represents a fourth embodiment of the invention.
  • This articulation combines, on either side of the articulation (3), two annular projections (9,12) according to one of the embodiments previously described.
  • the combination shown is that of Figures 2 and 3 but all are possible.
  • at least part of the bolting operation of at least one end is carried out after mounting on the arm (2).
  • This configuration prevents the separation of rigid elements regardless of their geometry.
  • FIG. 6 represents a joint (3) during the bolting process which makes it possible to create a projection (9) at one of the ends of the internal reinforcement by cold deformation (creep) of the material.
  • the bolting consists in exerting, by means of a bolt (20) rotating around an oblique axis and rolling on the end of a tube, a very high local pressure which radially repels the material.
  • This process takes place cold (slight increase in temperature quite compatible with the elastomer) makes it possible to form an annular projection only after the molding of the elastomeric part.
  • the molding is thus carried out in a favorable configuration (internal tubular frame).

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Child & Adolescent Psychology (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)
  • Pivots And Pivotal Connections (AREA)

Abstract

The invention concerns elastic articulations and ways of making safe such articulations. An annular protuberance (9), provided by heading the end of internal frame (6), ensures the safety of the articulation (3). Said process is carried out after the elastomeric material (7) of the articulation has been moulded. Said arrangement enables, for example, to prevent the elements (1, 2) linked by the articulation (3) from being entirely separated in case the elastomeric material is ruptured.

Description

Sécurisation d'articulation élastique Securing elastic joint
La présente invention concerne les articulations élastomériques utilisées en particulier sur les véhicules automobiles et les procédés d'obtention de ces articulations. Le rôle de ces articulations est généralement double. D'une part, elles permettent des degrés de liberté aux éléments rigides qu'elles relient. D'autre part, elles filtrent une part importante des vibrations ou des chocs transmis par la route ou le moteur du véhicule. D'une façon schématique, une telle articulation est constituée de parties rigides reliées entre elles par au moins un élément souple. En fonctionnement normal, les mouvements relatifs de parties rigides sont autorisés par la déformation élastique du ou des élément souples. En cas de rupture de l'élément déformable à la suite d'une sollicitation extrême, d'un défaut ou de l'usure normale de la pièce, il est parfois indispensable, par exemple pour des raisons de sécurité passive, que les éléments rigides soient maintenus solidaires.The present invention relates to elastomeric joints used in particular on motor vehicles and the methods for obtaining these joints. The role of these joints is generally twofold. On the one hand, they allow degrees of freedom to the rigid elements which they connect. On the other hand, they filter a significant part of the vibrations or shocks transmitted by the road or the vehicle engine. Schematically, such a joint consists of rigid parts connected together by at least one flexible element. In normal operation, the relative movements of rigid parts are authorized by the elastic deformation of the flexible element or elements. In the event of rupture of the deformable element following extreme stress, a defect or normal wear of the part, it is sometimes essential, for example for reasons of passive safety, that the rigid elements are held together.
D'autre part, sous de fortes sollicitations, la force de fixation de l'articulation à l'élément rigide peut devenir insuffisante, ce qui peut conduire également à la rupture de la liaison. Le fait d'empêcher la séparation des éléments rigides articulés en cas de sollicitations extrêmes est désigné sous le terme de 'sécurisation' d'articulation par les spécialistes de ces produits.On the other hand, under high stresses, the force of attachment of the joint to the rigid element may become insufficient, which can also lead to the rupture of the connection. The fact of preventing the separation of the rigid articulated elements in the event of extreme stresses is designated by the specialists of these products as "securing" of articulation.
Par ailleurs, on peut vouloir contrôler l'amplitude maximale des déformations pour différentes raisons, comme la protection de l'articulation elle-même ou d'autres organes qui pourraient être endommagés en cas de contact.In addition, one may want to control the maximum amplitude of the deformations for various reasons, such as the protection of the joint itself or of other organs which could be damaged in the event of contact.
Ainsi, dans le cas d'articulations constituées d'armatures sensiblement cylindriques et concentriques rendues solidaires par l'interposition d'un élément élastomérique adhérisé, la rupture de cet élément peut permettre la séparation complète des pièces rigides respectivement liées aux armatures .Ces articulations sont généralement fixées par emmanchement serré dans la pièce extérieure et liées à l'autre pièce par une vis ou un boulon traversant l'armature intérieure. Si l'articulation est soumise à une force importante (choc par exemple), le risque existe qu'elle sorte de cet emmanchement, interrompant la liaison.Thus, in the case of articulations made up of substantially cylindrical and concentric reinforcements made integral by the interposition of an adhered elastomeric element, the rupture of this element can allow the complete separation of the rigid parts respectively linked to the reinforcements. generally fixed by tight fitting in the external part and linked to the other part by a screw or a bolt passing through the internal reinforcement. If the joint is subjected to a significant force (shock for example), there is a risk that it will come out of this fitting, interrupting the connection.
Pour éviter une telle séparation sans pour autant modifier la géométrie de l'environnement de l'articulation, on introduit lors du montage un élément supplémentaire maintenu par les moyens de fixation. Cet élément prend la forme d'une épaisse rondelle métallique plate ou profilée. La taille de cette rondelle est tel qu'en cas de rupture de l'élément déformable, la rondelle empêche la séparation des armatures. De même, en cas de glissement de l'articulation par rapport à l'élément rigide associé, une rondelle de taille suffisante (supérieure à celle de l'emmanchement) empêche la séparation complète des éléments. L'énergie dissipée lors de ces déformations (en cas de choc exceptionnel) est un critère de performance important de ces liaisons.To avoid such a separation without modifying the geometry of the environment of the joint, an additional element is maintained during assembly maintained by the fixing means. This element takes the form of a thick flat or profiled metal washer. The size of this washer is such that in the event of the deformable element breaking, the washer prevents the separation of reinforcements. Likewise, if the joint slips relative to the associated rigid element, a washer of sufficient size (greater than that of the fitting) prevents complete separation of the elements. The energy dissipated during these deformations (in the event of an exceptional shock) is an important performance criterion for these links.
Un autre fonction possible (en fonction de la géométrie retenue) de cette rondelle est de limiter la déformation de l'élastomère en cas de sollicitations extrêmes afin de protéger l'articulation.Another possible function (depending on the geometry selected) of this washer is to limit the deformation of the elastomer in the event of extreme stresses in order to protect the joint.
Cependant, l'emploi d'une telle rondelle présente l'inconvénient d'introduire une pièce supplémentaire et de compliquer le montage, surtout s'il est automatisé. Ceci a des répercussions inévitables en termes de coûts.However, the use of such a washer has the disadvantage of introducing an additional part and complicating the assembly, especially if it is automated. This has inevitable cost implications.
L'invention propose de remplacer cet élément supplémentaire par un profil spécifique de l'extrémité de l'armature intérieure qui intègre les fonctions de la rondelle de l'art antérieur tout en supprimant les manipulations associées.The invention proposes to replace this additional element by a specific profile of the end of the interior frame which integrates the functions of the washer of the prior art while eliminating the associated manipulations.
L'invention consiste en une articulation élastique comprenant une armature rigide radialement intérieure présentant au niveau d'une première extrémité un premier diamètre extérieur maximal et une armature rigide radialement extérieure présentant un premier diamètre intérieur minimal d'une extrémité adjacente, les dites armatures rigides sensiblement cylindriques et concentriques étant solidaires sans glissement d'un matériau élastomérique, ladite première extrémité dépassant axialement de ladite armature extérieure, ledit premier diamètre extérieur de ladite armature rigide radialement intérieure étant supérieur audit premier diamètre intérieur minimal de ladite armature rigide radialement extérieure.The invention consists of an elastic articulation comprising a rigid radially inner reinforcement having at a first end a first maximum external diameter and a rigid radially external reinforcement having a first minimum internal diameter of an adjacent end, said rigid reinforcements substantially cylindrical and concentric being integral without sliding of an elastomeric material, said first end projecting axially from said outer frame, said first outside diameter of said rigid radially inner frame being greater than said first minimum inside diameter of said rigid radially outside frame.
L'invention consiste également en un procédé de sécurisation d'une articulation élastique comprenant une armature rigide radialement extérieure et une armature rigide radialement intérieure, lesdites armatures étant sensiblement cylindriques et concentriques, solidaires sans glissement d'un élément élastomérique, ledit élément élastomérique étant formé par moulage, une déformation axiale de ladite articulation élastique étant limitée par le fait qu'un diamètre extérieur maximal d'une extrémité de ladite armature radialement intérieure est supérieur à un diamètre intérieur minimal de ladite armature radialement extérieure, ledit diamètre extérieur maximal étant obtenu, après moulage dudit élément élastomérique, par bouterollage de ladite extrémité de ladite armature radialement intérieure. Une première variante de l'invention propose de combiner une augmentation de diamètre limitée avec une réduction du diamètre intérieur minimal de l'armature extérieure conférée par un profil particulier de l'extrémité de l'armature extérieure.The invention also consists in a method of securing an elastic articulation comprising a radially external rigid reinforcement and a radially internal rigid reinforcement, said reinforcements being substantially cylindrical and concentric, integral without sliding with an elastomeric element, said elastomeric element being formed by molding, an axial deformation of said elastic articulation being limited by the fact that a maximum external diameter of one end of said radially internal reinforcement is greater than a minimum internal diameter of said radially external reinforcement, said maximum external diameter being obtained, after molding of said elastomeric element, by rolling of said end of said radially inner frame. A first variant of the invention proposes to combine an increase in limited diameter with a reduction in the minimum internal diameter of the external reinforcement conferred by a particular profile of the end of the external reinforcement.
Une seconde variante de l'invention propose de réaliser cette augmentation de diamètre après le montage de l'articulation sur l'un des éléments rigides qu'elle relie.A second variant of the invention proposes to achieve this increase in diameter after mounting the joint on one of the rigid elements which it connects.
Cette déformation locale est obtenue par fluage à froid de la matière constituant l'extrémité de l'armature interne sous l'action d'une bouterolle selon le procédé décrit dans le document US5301414. Ce procédé est dénommé 'bouterollage'.This local deformation is obtained by cold creep of the material constituting the end of the internal reinforcement under the action of a chuck according to the method described in document US5301414. This process is called 'rolling'.
Selon les variantes, divers degrés de bouterollage peuvent être envisagés. Un bouterollage tendant à augmenter le diamètre extérieur de l'armature intérieure au delà du diamètre extérieur de l'articulation (diamètre de l'emmanchement) permet la sécurisation de l'articulation. On peut limiter le bouterollage à l'obtention d'un diamètre extérieur supérieur au diamètre intérieur de l'armature extérieure sans dépasser le diamètre nominal de l'articulation (diamètre d'emmanchement). Ceci permet un montage de l'articulation sans contrainte particulière tout en empêchant la séparation des armatures en cas de rupture de la partie élastomérique.According to the variants, various degrees of rolling can be envisaged. A snap tending to increase the outside diameter of the internal reinforcement beyond the outside diameter of the joint (diameter of the fitting) allows the joint to be secured. It is possible to limit the bolting to obtaining an outside diameter greater than the inside diameter of the outer frame without exceeding the nominal diameter of the joint (fitting diameter). This allows mounting of the joint without any particular constraint while preventing the separation of the reinforcements in the event of the elastomeric part breaking.
En associant au bouterollage de l'armature intérieure, une forme particulière de l'armature extérieure formant une butée d'emmanchement et une réduction de son diamètre minimal, on obtient une sécurisation complète dans le sens de montage de l'articulation, tout en limitant l'ampleur nécessaire de la déformation par bouterollage.By associating with the fixing of the internal reinforcement, a particular shape of the external reinforcement forming a fitting stop and a reduction of its minimum diameter, one obtains complete securing in the direction of assembly of the articulation, while limiting the necessary extent of deformation by bolting.
On peut également réaliser tout ou partie de l'augmentation de diamètre après le montage de l'articulation sur l'élément rigide associé. Ceci permet d'augmenter le diamètre au delà du diamètre de l'emmanchement sans limiter les possibilités de montage de l'articulation.It is also possible to carry out all or part of the increase in diameter after mounting the joint on the associated rigid element. This allows the diameter to be increased beyond the diameter of the fitting without limiting the possibilities of mounting the joint.
Afin de réaliser une articulation sécurisée dans les deux sens de glissement suivant son axe, on peut procéder au bouterollage de la seconde extrémité de l'articulation comme précédemment décrit pour la première. Naturellement, on peut également combiner les principes de l'invention et le procédé de l'art antérieur (rondelle ou équivalent) sur une même articulation pour réaliser cette sécurisation dans les deux sens. La fonction de sécurisation peut être symétrique ou différente, de même que la configuration choisie pour la réaliser dépend de la géométrie de l'environnement de l'articulation, des options de montage possibles et de leurs coûts respectifs. Les différents principes et modes de réalisation de l'invention seront mieux compris à l'aide des figures suivantes :In order to achieve a secure articulation in the two sliding directions along its axis, it is possible to press the second end of the articulation as previously described for the first. Naturally, it is also possible to combine the principles of the invention and the method of the prior art (washer or equivalent) on the same joint to achieve this securing in both directions. The securing function can be symmetrical or different, just as the configuration chosen to achieve it depends on the geometry of the environment of the joint, the possible mounting options and their respective costs. The various principles and embodiments of the invention will be better understood using the following figures:
Fig 1 : sécurisation par rondelle (art antérieur) Fig 2 : articulation sécurisée par bouterollage,Fig 1: securing by washer (prior art) Fig 2: articulation secured by bolting,
Fig 3 : articulation sécurisée par bouterollage associé à un profil particulier de l'armature extérieure,Fig 3: articulation secured by bolting associated with a particular profile of the external frame,
Fig 4 : articulation partiellement sécurisée par bouterollage associé à un profil particulier de l'armature extérieure, Fig 5 : articulation doublement sécurisée,Fig 4: articulation partially secured by bolting associated with a particular profile of the external frame, Fig 5: articulation doubly secured,
Fig 6 : articulation subissant le procédé de bouterollage.Fig 6: joint undergoing the bolting process.
A la figure 1, on a représenté un exemple de montage connu de l'art antérieur. Des éléments rigides tels que l'essieu, le porte-roue ou la caisse (1) d'un véhicule et un bras (2) de sa suspension sont articulés par l'intermédiaire d'une articulation élastique (3). L'armature extérieure (8) de l'articulation (3) est emmanchée à force dans le bras (2). L'armature intérieure (6) de l'articulation (3) est maintenue solidaire à la caisse (1) par une vis (4). Afin de limiter la déformation de l'articulation ou d'empêcher la séparation complète du bras et de la caisse en cas de rupture de l'élément déformable (7) ou de démanchement de l'articulation, on interpose une rondelle (5) dont le diamètre est supérieur à celui de l'emmanchement dans le bras. Le profil de cette rondelle peut varier. On peut évidemment employer une seconde rondelle placée à l'autre extrémité axiale de l'articulation si la géométrie des éléments rigides est différente et que l'on veut éviter une déformation axiale excessive de l'articulation dans les deux sens suivant son axe.In Figure 1, there is shown an example of assembly known from the prior art. Rigid elements such as the axle, the wheel carrier or the body (1) of a vehicle and an arm (2) of its suspension are articulated by means of an elastic articulation (3). The outer frame (8) of the joint (3) is force fitted into the arm (2). The internal frame (6) of the articulation (3) is held integral with the body (1) by a screw (4). In order to limit the deformation of the articulation or to prevent the complete separation of the arm and the body in the event of rupture of the deformable element (7) or of separation of the articulation, a washer (5) is interposed, the diameter is greater than that of the arm fitting. The profile of this washer may vary. It is obviously possible to use a second washer placed at the other axial end of the joint if the geometry of the rigid elements is different and it is desired to avoid excessive axial deformation of the joint in both directions along its axis.
La figure 2 représente une articulation selon l'invention. Une projection annulaire (9), formée sur une première extrémité de l'armature intérieure (6) par bouterollage présente un diamètre extérieur maximal supérieur au diamètre intérieur minimal de l'armature extérieure (8) et assure les mêmes fonctions que la rondelle (5) de la figure 1. Dans le cas ou l'opération de bouterollage a lieu avant le montage de l'articulation dans le bras, on peut réaliser l'emmanchement en exerçant la pression d'emmanchement sur l'armature intérieure, ce qui peut simplifier l'outillage nécessaire, donc en abaisser le coût.Figure 2 shows a joint according to the invention. An annular projection (9), formed on a first end of the inner frame (6) by bolting has a maximum outside diameter greater than the minimum inside diameter of the outer frame (8) and performs the same functions as the washer (5 ) of Figure 1. In the case where the bolting operation takes place before mounting the articulation in the arm, the fitting can be carried out by exerting the fitting pressure on the internal frame, which can simplify the necessary tools, thus lowering the cost.
La figure 3 représente un second mode de réalisation de l'invention. La différence par rapport à la figure 2 réside dans le fait que la projection annulaire (9) obtenue par bouterollage est moins importante et coopère avec une extrémité (10) de l'armature extérieure qui présente un épaulement (16) et une réduction (15) de son diamètre intérieur. Les avantages décrits pour le mode de réalisation de la figure 2 sont conservés et la taille relative de la projection (9) est réduite. Les dimensions et formes de l'épaulement (16) et de la réduction (15) relativement au profil de la projection annulaire (9) peuvent permettre de moduler la quantité d'énergie dissipée lors d'un choc exceptionnel comme on les simulent à l'occasion de " crash tests ".FIG. 3 represents a second embodiment of the invention. The difference compared to FIG. 2 lies in the fact that the annular projection (9) obtained by bolting is less significant and cooperates with one end (10) of the external reinforcement which has a shoulder (16) and a reduction (15 ) of its internal diameter. The advantages described for the embodiment of Figure 2 are preserved and the relative size of the projection (9) is reduced. The dimensions and shapes of the shoulder (16) and of the reduction (15) relative to the profile of the annular projection (9) can make it possible to modulate the amount of energy dissipated during an exceptional impact as they are simulated at l occasion of "crash tests".
La figure 4 concerne un troisième mode de réalisation de l'invention. L'intérêt par rapport aux modes précédemment décrits (figure 2 et 3) réside dans le fait que l'emmanchement de l'articulation (3) dans le bras (2) est possible dans les deux sens car le diamètre extérieur de la projection (9) est inférieur à celui de l'emmanchement. L'armature extérieure comporte une réduction (15) qui coopère avec la projection annulaire (9) dans le but d'empêcher la séparation des éléments rigides articulés (1,2). Cette fonction n'est assurée que dans la limite de la force de maintient de l'emmanchement.Figure 4 relates to a third embodiment of the invention. The advantage compared to the previously described modes (FIGS. 2 and 3) lies in the fact that the fitting of the articulation (3) in the arm (2) is possible in both directions because the outside diameter of the projection ( 9) is less than that of the fitting. The external frame has a reduction (15) which cooperates with the annular projection (9) in order to prevent the separation of the rigid articulated elements (1,2). This function is only ensured within the limit of the holding force of the fitting.
La figure 5 représente un quatrième mode de réalisation de l'invention. Cette articulation combine, de part et d'autre de l'articulation (3), deux projections annulaires (9,12) selon l'une des réalisations précédemment décrites. La combinaison représentée est celle des figures 2 et 3 mais toutes sont possibles. Dans le cas (ici représenté) où l'emmanchement de l'articulation finie (3) serait impossible, on réalise au moins une partie de l'opération de bouterollage d'au moins une extrémité après montage sur le bras (2). Cette configuration permet d'empêcher la séparation des éléments rigides indépendamment de leur géométrie. On a représenté ici le cas de la liaison entre un bras (2) et une barre (1 1).FIG. 5 represents a fourth embodiment of the invention. This articulation combines, on either side of the articulation (3), two annular projections (9,12) according to one of the embodiments previously described. The combination shown is that of Figures 2 and 3 but all are possible. In the case (here shown) where the fitting of the finished joint (3) would be impossible, at least part of the bolting operation of at least one end is carried out after mounting on the arm (2). This configuration prevents the separation of rigid elements regardless of their geometry. We have shown here the case of the connection between an arm (2) and a bar (1 1).
La figure 6 représente une articulation (3) au cours du procédé de bouterollage qui permet de créer une projection (9) à l'une des extrémités de l'armature intérieure par déformation (fluage) à froid de la matière. Comme il est décrit plus précisément dans le brevet US5301414, le bouterollage consiste à exercer par l'intermédiaire d'une bouterolle (20) tournant autour d'un axe oblique et roulant sur l'extrémité d'une tube une pression locale très importante qui repousse radialement la matière. Le fait que ce procédé se déroule à froid (faible augmentation de température tout à fait compatible avec l'élastomère) permet de ne former une projection annulaire qu'après le moulage de la partie élastomérique. Le moulage est ainsi réalisé dans une configuration favorable (armature interne tubulaire). FIG. 6 represents a joint (3) during the bolting process which makes it possible to create a projection (9) at one of the ends of the internal reinforcement by cold deformation (creep) of the material. As described more precisely in US Pat. No. 5,301,414, the bolting consists in exerting, by means of a bolt (20) rotating around an oblique axis and rolling on the end of a tube, a very high local pressure which radially repels the material. The fact that this process takes place cold (slight increase in temperature quite compatible with the elastomer) makes it possible to form an annular projection only after the molding of the elastomeric part. The molding is thus carried out in a favorable configuration (internal tubular frame).

Claims

REVENDICATIONS
1. Articulation élastique (3) comprenant une armature rigide radialement intérieure (6) présentant au niveau d'une première extrémité un premier diamètre extérieur maximal et une armature rigide radialement extérieure (8) présentant un premier diamètre intérieur minimal d'une extrémité adjacente, les dites armatures (6,8) rigides sensiblement cylindriques et concentriques étant solidaires sans glissement d'un matériau élastomérique (7), ladite première extrémité dépassant axialement de ladite armature extérieure (8), ledit premier diamètre extérieur de ladite armature rigide radialement intérieure (6) étant supérieur audit premier diamètre intérieur minimal de ladite armature rigide radialement extérieure (8).1. Elastic joint (3) comprising a radially inner rigid frame (6) having at a first end a first maximum outer diameter and a radially outer rigid frame (8) having a first minimum inner diameter of an adjacent end, said rigid substantially cylindrical and concentric reinforcements (6,8) being integral without sliding with an elastomeric material (7), said first end projecting axially from said external reinforcement (8), said first external diameter of said rigid radially internal reinforcement ( 6) being greater than said first minimum internal diameter of said rigid radially external reinforcement (8).
2. Articulation élastique (3) selon la revendication 1, caractérisée en ce que ledit premier diamètre extérieur maximal de ladite armature rigide radialement intérieure (6) correspond à une première projection annulaire (9) obtenue par bouterollage de ladite première extrémité après adhérisation desdites armatures rigides (6,8) avec ledit matériau élastomérique (7).2. elastic joint (3) according to claim 1, characterized in that said first maximum outside diameter of said radially inner rigid frame (6) corresponds to a first annular projection (9) obtained by bolting of said first end after adhesion of said frames rigid (6,8) with said elastomeric material (7).
3. Articulation élastique (3) selon l'une des revendications précédentes, caractérisée en ce que ledit premier diamètre extérieur maximal de ladite armature rigide radialement intérieure (6) est inférieur à un diamètre extérieur nominal de ladite armature rigide radialement extérieure (8).3. Elastic joint (3) according to one of the preceding claims, characterized in that said first maximum outside diameter of said radially inner rigid frame (6) is less than a nominal outside diameter of said radially outer rigid frame (8).
4. Articulation élastique (3) selon l'une des revendications 1 et 2, caractérisée en ce que ledit premier diamètre extérieur maximal de ladite armature rigide radialement intérieure (6) est supérieur à un diamètre extérieur nominal de ladite armature rigide radialement extérieure (8).4. Elastic joint (3) according to one of claims 1 and 2, characterized in that said first maximum outside diameter of said radially inner rigid frame (6) is greater than a nominal outside diameter of said radially outer rigid frame (8 ).
5. Articulation élastique (3) selon l'une des revendications précédentes, ladite armature rigide radialement intérieure (6) présentant, au niveau d'une seconde extrémité axialement opposée à ladite première extrémité, un second diamètre extérieur maximal, ladite seconde extrémité dépassant axialement de ladite armature extérieure, caractérisée en ce que ledit second diamètre extérieur de ladite armature rigide radialement intérieure (6) est supérieur à un second diamètre intérieur minimal d'une seconde extrémité adjacente de ladite armature rigide radialement extérieure (8).5. elastic joint (3) according to one of the preceding claims, said radially inner rigid frame (6) having, at a second end axially opposite to said first end, a second maximum outside diameter, said second end projecting axially of said outer frame, characterized in that said second outer diameter of said radially inner rigid frame (6) is greater than a second minimum inner diameter of a second adjacent end of said radially outer rigid frame (8).
6. Articulation élastique (3) selon la revendication 5, caractérisée en ce que ledit second diamètre extérieur maximal au niveau de ladite seconde extrémité de ladite armature rigide radialement intérieure (6) correspond à une seconde projection annulaire (12) obtenue par bouterollage de ladite seconde extrémité après adhérisation desdites armatures rigides (6,8) avec ledit matériau élastomérique (7).6. elastic joint (3) according to claim 5, characterized in that said second maximum external diameter at said second end of said rigid frame radially interior (6) corresponds to a second annular projection (12) obtained by bolting said second end after adhering said rigid frames (6,8) with said elastomeric material (7).
7. Articulation élastique (3) selon l'une des revendications 5 et 6, caractérisée en ce que ledit second diamètre extérieur maximal de ladite armature rigide radialement intérieure (6) est inférieur à un diamètre extérieur nominal de ladite armature rigide radialement extérieure (8).7. elastic joint (3) according to one of claims 5 and 6, characterized in that said second maximum external diameter of said radially inner rigid frame (6) is less than a nominal outside diameter of said radially outer rigid frame (8 ).
8. Articulation élastique (3) selon l'une des revendications 5 et 6, caractérisée en ce que ledit second diamètre extérieur maximal de ladite armature rigide radialement intérieure (6) est supérieur à un diamètre extérieur nominal de ladite armature rigide radialement extérieure (8).8. Elastic joint (3) according to one of claims 5 and 6, characterized in that said second maximum outside diameter of said radially inner rigid frame (6) is greater than a nominal outside diameter of said radially outer rigid frame (8 ).
9. Articulation élastique (3) selon l'une des revendications précédentes, ladite articulation (3) étant emmanchée dans un élément rigide (2) caractérisée en ce que l'une au moins desdites première et seconde projections annulaires (9,12) est formée par bouterollage au moins en partie après emmanchement de ladite articulation (3) dans ledit élément rigide (2).9. Elastic articulation (3) according to one of the preceding claims, said articulation (3) being fitted into a rigid element (2) characterized in that at least one of said first and second annular projections (9,12) is formed by snapping at least partially after fitting of said articulation (3) in said rigid element (2).
10. Procédé de sécurisation d'une articulation élastique (3) comprenant une armature rigide radialement extérieure (8) et une armature rigide radialement intérieure (6), lesdites armatures (6,8) étant sensiblement cylindriques et concentriques, solidaires sans glissement d'un élément élastomérique (7), ledit élément élastomérique (7) étant formé par moulage, une déformation axiale de ladite articulation élastique (3) étant limitée par le fait qu'un diamètre extérieur maximal d'une extrémité de ladite armature radialement intérieure est supérieur à un diamètre intérieur minimal de ladite armature radialement extérieure, ledit diamètre extérieur maximal étant obtenu, après moulage dudit élément élastomérique, par bouterollage de ladite extrémité de ladite armature radialement intérieure.10. Method for securing an elastic articulation (3) comprising a radially outer rigid frame (8) and a radially inner rigid frame (6), said frames (6,8) being substantially cylindrical and concentric, integral without sliding of an elastomeric element (7), said elastomeric element (7) being formed by molding, an axial deformation of said elastic articulation (3) being limited by the fact that a maximum external diameter of one end of said radially internal reinforcement is greater to a minimum internal diameter of said radially external reinforcement, said maximum external diameter being obtained, after molding of said elastomeric element, by snap-fastening of said end of said radially internal reinforcement.
1 1. Procédé de sécurisation selon la revendication 10, ladite articulation étant emmanchée dans un élément rigide, caractérisé en ce que ledit diamètre extérieur maximal est obtenu par bouterollage au moins en partie après emmanchement de ladite articulation dans ledit élément rigide. 1 1. Securing method according to claim 10, said articulation being fitted into a rigid element, characterized in that said maximum outside diameter is obtained by bolting at least partially after fitting of said articulation into said rigid element.
PCT/EP2001/000650 2000-01-26 2001-01-22 Elastic articulation safety WO2001055614A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP01909670A EP1250538B1 (en) 2000-01-26 2001-01-22 Elastic articulation safety
DE60109415T DE60109415D1 (en) 2000-01-26 2001-01-22 SECURING AN ELASTIC JOINT
AU2001237328A AU2001237328A1 (en) 2000-01-26 2001-01-22 Elastic articulation safety

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FR0001013 2000-01-26
FR00/01013 2000-01-26

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WO2001055614A1 true WO2001055614A1 (en) 2001-08-02

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Publication number Priority date Publication date Assignee Title
DE102006045620B4 (en) * 2006-09-25 2009-10-29 Roland Dr. Kilper Device and method for receiving, transporting and storing microscopic samples
JP5184287B2 (en) * 2008-10-01 2013-04-17 東洋ゴム工業株式会社 Anti-vibration bush

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5301414A (en) * 1991-07-23 1994-04-12 Caoutchouc Manufacture Et Plastiques Process for shaping a reinforcement on the extremities of the internal casing of an elastic joint, after molding, and its applications
DE4411518C1 (en) * 1994-04-02 1995-08-24 Freudenberg Carl Fa Mfg. process for support bearings with stop restricting extreme movements
WO1997047897A1 (en) * 1996-06-13 1997-12-18 Caoutchouc Manufacture Et Plastiques Resilient hinge and method for making same
WO1998012453A1 (en) * 1996-09-18 1998-03-26 Lord Corporation Vibration isolation insert for aircraft floor panels and the like
EP0926380A1 (en) * 1997-12-26 1999-06-30 Sanshin Industries Co., Ltd. Control handle for a vibration generating apparatus

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Publication number Priority date Publication date Assignee Title
GB563871A (en) * 1943-03-25 1944-09-01 Constant Speed Airscrews Ltd Improvements in resilient mountings

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5301414A (en) * 1991-07-23 1994-04-12 Caoutchouc Manufacture Et Plastiques Process for shaping a reinforcement on the extremities of the internal casing of an elastic joint, after molding, and its applications
DE4411518C1 (en) * 1994-04-02 1995-08-24 Freudenberg Carl Fa Mfg. process for support bearings with stop restricting extreme movements
WO1997047897A1 (en) * 1996-06-13 1997-12-18 Caoutchouc Manufacture Et Plastiques Resilient hinge and method for making same
WO1998012453A1 (en) * 1996-09-18 1998-03-26 Lord Corporation Vibration isolation insert for aircraft floor panels and the like
EP0926380A1 (en) * 1997-12-26 1999-06-30 Sanshin Industries Co., Ltd. Control handle for a vibration generating apparatus

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AU2001237328A1 (en) 2001-08-07
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EP1250538B1 (en) 2005-03-16

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